A Security Researcher at Abuse.ch has started SSL blacklist project to create an archive of all the digital certificates used for illicit activities.

Botmastersare exploiting new techniques to avoid detection by security experts and law enforcement agencies, let’s consider, for example, that many attackers are using SSL to protect malicious traffic between C&C and infected machines.

A researcher has started a new initiative to track the certificates used by bad actors in malicious operations and publish them in a blacklist, dubbed SSL Black List.

The SSL Black List is part of the project started by a Swiss security researcher at Abuse.ch who has participated in the last years to the investigations on the principal major banker Trojan families and botnets.

Each item in the list associates a certificate to the malicious operations in which attackers used it. The abuses include botnets, malware campaigns and banking malware.

The archive behind the SSL Black List, which actually include more thank 125 digital certificates, comprises SHA-1 fingerprints of each certificate with a description of the abuse. Many entries are associated with popular botnets and malware-based attacks, including Zeus, Shylock and Kins.

The project is the work of a Swiss security researcher at Abuse.ch who for years has provided resources for tracking many of the major banking Trojan families and botnets.

“The goal of SSLBL is to provide a list of bad SHA1 fingerprints of SSL certificates that are associated with malware and botnet activities. Currently, SSLBL provides an IP based and a SHA1 fingerprint based blacklist in CSV and Suricata rule format. SSLBL helps you in detecting potential botnet C&C traffic that relies on SSL, such as KINS (aka VMZeuS) and Shylock,” wrote the researcher in a blog post which introduce the initiative.

I have already explained in a previous post that Google is very active in the prevention of any abuse of stolen or unauthorized digital certificates, early this year announced its Certificate Transparency project, a sort of a public register of digital certificates that have been issued.

“Specifically, Certificate Transparency makes it possible to detect SSL certificates that have been mistakenly issued by a certificate authority or maliciously acquired from an otherwise unimpeachable certificate authority. It also makes it possible to identify certificate authorities that have gone rogue and are maliciously issuing certificates.” states the official page of the project.

Unfortunately still many certificate authorities aren’t providing to the public logs.

The SSL Black List is another project that could help the security community to prevent cyber attacks, when the database will grow up it will represent a precious sources for security experts in the fight to malware and botnet operators that are using certificates in their operations.

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Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines.
Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.

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